Merchant and diplomat.
Official and family correspondence, journals, manuscript drafts of Roberts' s
book Embassy to the Eastern Courts of Cochin-China, Siam, and Muscat
. . . During the Years 1832-34, diplomatic documents, legal and financial papers, and miscellaneous
material chiefly documenting his service as a special agent of the U.S. to
negotiate treaties with Siam, Muscat, and Cochin China.